I would recommend purchasing a third party licensing and activation library. It is very difficult to get this "just right", and will take quite a bit of development time that is typically better spent improving your product. For example, this option provides obfuscation + multiple licensing options including trials, etc, for under $200 US. If you value your time, it'd be difficult to hand-roll something for less money...
There are many options out there for .NET applications. A search for ".net licensing library" will return many companies specializing in this area.
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我建议购买第三方许可和激活库。要做到“恰到好处”是非常困难的，并且需要花费大量的开发时间，而这些时间通常最好花在改进产品上。例如，此选项提供混淆+多种许可选项，包括试用等，价格不到 200 美元。如果您珍惜时间，那么花更少的钱手工制作一些东西就很困难....
NET 应用程序有很多选择。搜索“.net 许可库”将返回许多专门从事该领域的公司。
I would recommend purchasing a third party licensing and activation library. It is very difficult to get this "just right", and will take quite a bit of development time that is typically better spent improving your product. For example, this option provides obfuscation + multiple licensing options including trials, etc, for under $200 US. If you value your time, it'd be difficult to hand-roll something for less money...
There are many options out there for .NET applications. A search for ".net licensing library" will return many companies specializing in this area.